Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
20~1923~
182 02
SY5~EM FOR PRO~E~TING GRt)~N~ W~T~-R UNE~ER A D~P
~EIÇa~
~L~I
~ he present invention ~el~ o a ~y~;t~ ~or prote~t-
5 ing the gr~und water urlder a du~p. ~o~e p~xticul~rly this
$n~rent~on ~on~erns an installation ~n~ m~3tho~ ~or ~hu~ p:rotec~ing
BU~terran~an ground water~
A ~ystex~ describ~d in copendin~ paten~ ~pplication
07, 714, 250 ~iled 11 June 1~91 ~o~ olating ~ dump sltting on the
~round ha~ three d-~ferent stru~tur~s which ~re in~talled under
the dump ~equentially/ as need~d. ~he ~ir~ ~truc:~ur~ includes a
~unnel drlltet~ ~ongltudinally through ~he grou~d und~rne~th ~h~
~ump ar~d ~n array o~ drainag~ Ripes pas~in~ ~r~u~h ~he ~round
15 and ea¢h ha~ng a lower end op~ ng into the ~urmel and ~n upper
end ~t ~he surf~ce. The second ~tructure include~ a w~ter
barrier in th~ ~round ~round a~ least ~o~e of th~ d~a~nas~e pipes.
~h~ th~rd ~tructur~ ~naludes a w~te~ pervious m~s~ Or b~kfill
in a ~ undern~ th~ barrier and ha~ring ~ lower end ~ ~he
~0 tunnel and an upper end at the sur~ace.,
2~4923~
~ erman p~tenk do~uP~nt ~,01~,8zl des~ibe~ a sy~tem
wher~ draina~ in ~uch ~ dump-protection i~st~lla~ion ~ as~i~ted
by providirlg a con~pressed-air arrangemen~ ~or keeping the p~r~-
xatlon~ ln th~ dr inage p~pe clear. Sueh ~1 ~;ys;te~ iæ used ~n
5 order to prevent blo~kages of the drainage pipe ~ro:m rendering
thQ in~tall~tion usele~s or regu~rin~ that i~ ~e dug up and
~er~iced ~nd/or replaced.
The rnain problem with the known ~ol~ions i~ ~h~t they
require ~hat expensive ~ining ~echnl~ue~ be applied t~ inst~ll
0 the~. The necessa~r tunnel~ and bllt~ mu~t b~ driven and ::ut by
e~uipme~t ~hat i~ expens~ve to own and opera~e. In~te~d o~ U~ing
~poil CUt ~rQm the ~¢e as b~c:k~ p~cl~l w~t~r impeX~riou~
~111 must be moved ~nto the Job, along wi~h th~ ~egulsite vapor-
barrier ~oil~. ~hese ~rocedure~ are ne~essary where th~ ~round
15 1~ 6tone or c~ ay, where ther~ i5 insu~Iicient percol~tion to
~l~ow th~ ~rair~a~e pipe~ ~o draw ~f the w~ter lea~hing down ~rorn
the d~np~ ~hu~ it i~ ~tandard to install leach pipes th~ lead
to the zero-pre~sure ~rainage tunnel, as th~ pressure in the
surroundlng Bton~ o~ ground is in~aria~ly ~omQwhA~ high~r.
2~4~23~
a202
~Qn
the~ef~re arl o~jecl: of ~h~ p~sen~ invention tCI
provide ~rl lmproved system ~r protect~ng t:he groun~ w~er under
a dump .
Another obj ec~ is ~he pro~ on o~ su~h an lmpro~r~d
~y~em ~or protecting the gro~nd w~er under ~ dump wh~ch c~v~r-
comes ~he ab~ve ~iven di advantag2~ a~ is whi~h ~n ~e in-
s~al~ed rather e2~ily, wi~hout the use o~ ~2xpen:~ive mining
~quipment .
A further ob~ect i5 ~o provids a~ impro~red ~n~thod o~
pr4~ecting grounà wat~r und0r a dump, and o~ in~t~ ng t~e
inventtv~ pr~tection ~y~tem.
~ .
An install~tion ~or pro~ecting ground water un~ern~ath
15 ~ dump acc:ording ~o lthe inventl~n h~ ~t le~ one tunne~ d~iven
lonS~it-ldinally tllrou~ th~ ground underneath the dump ~nd an
ar~ay o~ ca~ing ~ipes passing through ~he ground, e;~ch havin~ a
lower end opening into th~ tlmnel, ~nd each ~oxm~d w~h ~ multi-
plic~ty o~ throughgoing hole~ ~he~ lng pipes 2Ire longitudl-
20 n~lly ~pac~d to receive liqu$d rom thelr ~urround~ng~ ~ndsonduct lt to the ~unn~ espectiv~ inn~r ~ube~ spa~edl~
recaived in ~he ~a~ing ~ipe~ ~rs provided ~o Rervl~e ~he respec-
~ive c~ins~ and th~ir hol~8., ~he ~Leach ~Eield accordllng to t~l~
-- 3
~92~
182 02
in~en~ion need only b~ provided underneath tho~e a~a~ o~ the
du~p whe~ the 1~ q~id leach~ng down from it can traYe~ need
not ~8 provided, ~or instance, under lmper~iou~ c:olid-rock
layer~ .
This 8ys~em ther~fo~e ~ ws ~he le~ h ~ie~d ~o~OEd by
th~ ca~ing~ to l~e in~ta~led us~nq ~tandard c~ dxilling ~q~pmen~
and t~c:hniq~es. It is a ~a~rly simpl~ ~o~, onc~e th~ ~unnel has
been ~riven, to ~lant drill t~ it an~l to in5t~11 standard p~o-
rated well c~ings in t~ese ~lan~-d~lled borefi.
A~aoxding to ~he invention ealch casing pip~ is iEorme~
o ~ p~uxal~ty o~ ~oined ca~ing-pipe Gect~i~ns and eac:h t~lb~
~imilarly ~ormed o~ a plur~lity o~ ~oined tu~e section~ ~ur-
the~mor~ 'che tu~es are provlded with ~ean6 ~or ale.~ning th~ holes
in the ~or~ o~ nozzles for dire~tin~ sp~ay~ o~ oleaning li~isl a~
15 ~he hole~ . ~his ~ ~ oppc~ite th~ ar~d~rd oil-drill ~tring where
the casin~ ~nerel~ ~erves ~o hold baok t~e ~urrouxading mat~ri~l
~nd the tube i~ used to pull out the o~l ~hat ~o~es throug,h ~h~
casing hole~ into th~ ~as~ ng.
Th~ me~hod according ~o the lnvention ha~ co~pri~e~
20 ~ir~t driving ~t least on~ senriCe tunnel longitudinally t~xoush
th~ ground undernea~h ~he du~np ~l~d tk~en ~ri11~ng An ~r~ay o~
bore3 Prc)n~ ~he ~ur~e down to th~ tum~el ~snd inst~ling in each
o~ the~ bore~ a re~pectiv~ casir~r pipe having a lo~er end
opening into ~he ~unnel and e~ch ~o~ne~ w~h a ~ ip~ y o~
25 through~olng holes. Su~ ntly ~ach ¢as~nS~ pipe ~ !Eitt~3d ~i~h
2 ~ 2 ~ ~
1820~
~, a resp~atlve inn~r ~ub~ prov~d~d with ~an~ ~o~ ~;enric~ng ~he
~esp~ ive casing ~n~ their ho~e~.
Yurt~exmor~ in ac~ord~n~e with 'ch,i~ inventic~n it
po~sible to pull the c~ings and t~ out O:e ~he bore3 ~n~o th~
5 ~erv~ce ~ur~nel. P~or~ particularly, periodically a new ~;e:::tion is
sdd~d to ~he upp~r end o~ at least on~ of the casings, ~he one
~asing 1~ pushed through i~ bor~ down into t~e ~unnel, and
~nd ~eation 1~ removed ~om the one s:asin~ in the t~mnel. ~hi~
allows th~ le~ch field to b~ Rervit::ed ~nd ~ep~ired ~ ly e~sily.
~o P~ccording ~o another ~eature o.~ the inventlon ~ wa~r~
proofing ~ed~um i5 injected i~om the c~ings ~hrous~h the:;,r h~les
into th~ gr~und surrounding lche ~a~iny~. Thi~ allows the ground
to b~ prepared underneath the dump ~o th~t 21ny ~eachant i5
con~uoted to th~ hol~ of ~the c~sinçls.
It is ~lso pos5i~1e ~n aac:c~xdanc:e Wi~h the ix~v~3ntiolA to
pexiod~cally 6pray cle3ning wa~er into the cas~n~s from ~he
~u~ng~ ~o ¢le~r the ::~sing~. ~h~s w2l~er is sprayed 21~ tha hole~
o~ the oaein~s ~o ~lear ~ame.
2~4~23~ :
2~2
~ he ~bove and other o~ ects, f~tures, and adv~nt~ges
wlll beaome more re~dily apparen~ from the ~ollo~in~, re~er~nce
being made to the accompanyirl~ dr~win~ in whi~:
~ig. 1 is a ~mall-~aale ver~ical ~cti~n iI~u~xa~ing
~he sy~tem and me~hod ~ the inven~ion;
Fi~, 2 i~ a l~rge~ le ~riew o~ the ~eta~l intlicated at
II ~n F~g. l;
3 ~ ~ vie~ lilce Fig. 1 o~ another sy~:teDh ~c~rd-
10 ing to the inv0ntion: and
~g. 4 ~ ea~ion ~kcln ~ n~ ~Ln~ TV of ~i~. 3.
A~ seen in Fig,. 1 a dump 1 that is p~rtially ~cessed
ln th~ g~ound G lies a~ove a ~utmel 2 d~iven long~tudinally
15 ~perpendi~ul~r ~o the plane o~ the view o~ F~g~ l) alld no~mall~
ha~flng opp~ end~ 'cha~ open a~ th~ ~ur~2a~, w~th upwardly
lnalin~d end ~ection~ le~ding up ~rom th~ lllus~ra~ed ~orizontal
etret~h o~ the tunn~l 2. To each sidQ o~ the tunn~l t~ a le~ch
field 3 ad~pted tP ~aptur~3 any l~sluid leac~lng down throu~h th~
~0 ~ound ~ro~ ~h~ dump 1. Suah le~han~ onduc~ed ~y the le~c~
field down to the ~unnol ~ wh~re it ~ o~c~ed and pumpe~ ou~
Fig4 ~ 6hows how th~ leach field is ~ormed ~y ~ ~lur~l~
ity of tandard caslng~ 4 each for~ed o~ a plurality o~ c~ dr~-
2~4~23~
~82 02
cal casing ~e~ions 4a. I2l6ide t~a~ cas$ng ~ aller diam~tertube 5 i~e~ ~ forlAed by a plurality o~ ub~ ~ection~ 5a. Th~
casing ~ lt~el~ is ~ormed with ~ad~ally thro~hgoing h~le~ S and
the tube 5 i~ ~ormed in line with each o~ these holes ~ h
5 nozzle 7~ Th~s it i~ possible t~ pressurize ~he tu~e 5 ~i~h
water ~o th~t the streams emitt8d by the no~les 7 clear ~he
holeg 6 whil~ ~he re~ul~t f~ow Wi~l 7dasl~ ~ny ~;e~lim~ant in the
c:asing 4 ~way down to the ~unnel 2.
The ca~ings ~ are in~talled in the st:and~rd ~anner Us~d
10 ln an oil-dr~lling operakion. Thu~ bore~ ar~ driv~n and ~he
casings are pu~he~ along ~ehind th~ d~illing bit,. Once the
ca~ing~ ar~a ~n place, ~he tubes 5 are ~it~ed ~o khe~ ne~s-
~ary the lo~sr ~tion of a ca9in~ 4 ~n b~ pushed ir~to the
~unnel ~ and t~keh l ~f ~o a~ w the c~s$n~ to be renewed by
15 adding ~eotion~ to its top end and pushinq the c~sin~ 4 down it~
~",, bore.
Figs. 3 and 4 ~how a ~m$1~ arrangement, wi~h identi-
cal r~ererlce~ used for functi~nally ar~d ~ urally identic~al
elements~ H~re how~ve~ the ca~ings 4 are used, be~ore in~e~ion
20 o~ the ~u~es 5, for in~ecting a ~eala~ o~ waterproo~ng ~3U~-
otance 8 into ~he ~ur~ounding ground. The sealant ma~ BO
a~r~rlged and deplo~ed that any desc~nding ~ea,c:hant i~; ~ondus~ed
to th~ ho~e~ 6.
